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API & MCP

ThumbView Thumbnail Previewer

Open ThumbView to compare multiple thumbnail variants across grid, list, mobile, and size previews.

As of June 2026, ThumbView Thumbnail Previewer has — users in the Functionality & UI category.

willy grizellatFunctionality & UI
Chrome Web Store ↗.crx
Usersno change0%
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Ratingno change0%
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— reviews
Reviewsno change0%
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Version
1.4.2
Manifest V3
90-day change · In the last 90 days this extension 2 version updates, changed permissions.

History

4 snapshots

Tracking since May 9, 2026.

Not enough history yet for this metric — the chart fills in as we collect more snapshots.
View as table
DateUsersRatingReviewsVersion
May 9, 2026———1.0.0
May 19, 2026———1.0.0
May 25, 2026———1.2.1
Jun 1, 20264——1.4.2
Now———1.4.2

Changelog

  • May 25, 2026
    short_description
    Compare multiple video thumbnails in realistic PC, tablet, mobile, light, and dark mode previews.
    Open ThumbView to compare multiple thumbnail variants across grid, list, mobile, and size previews.
  • May 25, 2026
    name
    Thumbnail Preview Tester
    ThumbView Thumbnail Previewer
  • May 25, 2026
    host_permissions
    *://*.youtube.com/*, *://i.ytimg.com/*
    https://thumbview.xyz/*
  • May 25, 2026
    permissions
    storage, activeTab
    storage
  • May 19, 2026
    short_description
    Preview YouTube thumbnails in realistic feed, search, sidebar, and mobile layouts before publishing.
    Compare multiple video thumbnails in realistic PC, tablet, mobile, light, and dark mode previews.
  • May 19, 2026
    name
    ThumbView Previewer
    Thumbnail Preview Tester

Permissions & access

Permissions
storage
Host access
https://thumbview.xyz/*

Screenshots

ThumbView Thumbnail Previewer screenshot 1ThumbView Thumbnail Previewer screenshot 2ThumbView Thumbnail Previewer screenshot 3ThumbView Thumbnail Previewer screenshot 4ThumbView Thumbnail Previewer screenshot 5ThumbView Thumbnail Previewer screenshot 6ThumbView Thumbnail Previewer screenshot 7

About

ThumbView Previewer helps creators test YouTube thumbnails before publishing.

Upload, paste, or load a thumbnail from a YouTube URL, then preview it inside realistic YouTube-style layouts. See how your thumbnail looks in the home feed, search results, suggested sidebar, mobile feed, and real display sizes.

Key features:

Preview thumbnails in a YouTube-style feed with real surrounding thumbnail images.
Test PC, tablet, and mobile layouts.
Switch between light mode and dark mode.
Check home feed, search results, suggested sidebar, mobile feed, and size preview views.
Upload, drag and drop, paste, or load a public YouTube thumbnail from a video URL.
Edit title, channel name, duration, views, and upload age.
Shuffle placement to compare your thumbnail against neighboring videos.
Use stress tests like squint, monochrome, dim, and tiny view.
Review basic thumbnail readiness checks for aspect ratio, resolution, contrast, brightness, and title length.
Optionally inject your preview thumbnail into the current YouTube tab for temporary local testing.
ThumbView Previewer stores your thumbnail and preview settings locally in Chrome storage. The extension does not require an account and does not collect personal data.

Technical

Version
1.4.2
Manifest
V3
Size
36.65KiB
Min Chrome
88
Languages
1
Featured
No

Metadata

ID
ebjeplhgmhnjbjlfbkjgojgcajelpneg
Developer ID
ucbccb0bcbcc6a719ec262b7ec90da51a
Developer Email
[email protected]
Created
May 8, 2026
Last Updated (Store)
May 25, 2026
Last Scraped
Jun 7, 2026
Website
—
Support URL
—
Privacy Policy
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Data sourced from the Chrome Web Store · last verified Jun 7, 2026.